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Author Topic: 1952 220 Sedan W187 build restoration  (Read 63885 times)

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Offline Henry Magno

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  • Location: USA, Massachusetts
  • Year_Model: 1952 220 Cab B, 1937 320 Sedan, 1937 320 Combination Coupe, 1938 320 Cab A LWB
Re: 1952 220 Sedan W187 build restoration
« Reply #380 on: March 06, 2019, 07:49:09 PM »
Sorry I have been away from this forum for a while. I determined what your head is from the cast in numbers between 3 & 4 spark plugs. You posted a picture of it. Yes you have to use the 8.7 gasket. You don't have to use the newer cam, but you might get better performance with it since the valve timing is optimized for the higher compression ratio. The number stamped into the rear end of the cam for the 8.7 is 33. The earliest 220 cams have no number, then 14 followed by 14/1. I think there are more cams than compression ratios as they were fiddling with the valve timing as they went along. These designations are listed either in the 220 manual or the later 180-220SE supplement for the pontons, since the early 220a ponton had a 7.6 head.
I can't look anything up because I'm in Florida for the Amelia concours.

Online yan2947

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  • Interior color: Red Leather W/Black Piping
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  • Year_Model: 1952 220 Sedan W187
Re: 1952 220 Sedan W187 build restoration
« Reply #381 on: March 07, 2019, 07:57:13 PM »
Henry, I hope you are enjoying Amelia.  Post some photos!  I think what you are saying is that my cam is fine.  There is no "33" stamped on it.  Could it be behind the gear?  The one side (as shown previously) has nothing stamped on the end.  Do you know which gasket (part number) I need?  So do I have a 220 cam?  Or is it a 220a setup?  Mine was replaced then?  Thank you for your invaluable time and information!
1952 220 Sedan W187
1989 911 LS1